That's the very principle of agnosticism. The very principle of atheism is I Don't Care. We can say there is no god because we don't really GAF about the minuscule chance that one of the numerous stories that appear to have been pulled from someone's butt is actually the correct answer to a question also pulled from possibly the same butt. It's not not really a big leap for most.

No your wrong. I care but as Atheist we don't know. If supporting evidence for a god ever came along I doubt there would be many Atheist left.